KR102732805B1 - Battery Disconnect Apparatus - Google Patents

Abstract

A battery power cut-off device is disclosed. According to one aspect of the present invention, a battery power cut-off device may include: a lower case having an open upper portion and a mounting space formed along a first axis direction in a longitudinal direction; a plurality of relays individually mounted in the mounting space; an upper case coupled to the lower case so as to cover an open upper portion of the mounting space and including a plurality of upper mounting spaces formed at positions corresponding one-to-one with the plurality of relays; and a permanent magnet disposed in each of the plurality of upper mounting spaces so as to control an arc generated from the relay.

Description

Battery Disconnect Apparatus

The present invention relates to a battery power cut-off device.

BDU (Battery Disconnect Unit) is a power control component of eco-friendly vehicles, and is a general term for a component that connects or disconnects power between the battery and the load.

It usually plays an important role along with the DC/DC converter, high-voltage converter, OBC, BMS, etc. that make up the eco-friendly vehicle battery system. Accordingly, the application of BDU is also expanding to eco-friendly vehicles that use batteries.

Such BDUs typically include multiple relays, such as a main relay, a pre-charge relay, a fast charging relay, and a slow charging relay, to operate in various modes, such as a discharge mode, a fast charging mode, and a slow charging mode.

However, when a conventional BDU includes a plurality of relays, each of the plurality of relays is individually housed inside a frame composed of an upper frame, a lower frame, and a bottom plate, and the body including fixed contacts and movable contacts is mounted together with the circuit board in a separate case formed as a single space.

Accordingly, conventional BDUs require parts for fixing multiple relays to each case, and work is required to electrically connect the coil terminals and connectors of each relay via cables such as wire harnesses to operate each relay.

Because of this, conventional BDUs have problems with poor workability and low price competitiveness due to the excessive number of parts and poor assembly.

The present invention is intended to solve the above problems, and an object of the present invention is to provide a battery power cut-off device capable of simplifying electrical connection work even when including a plurality of relays.

Another object of the present invention is to provide a battery power cut-off device capable of easily configuring an electrical connection between a relay and a circuit board.

The tasks of the present invention are not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art to which the present invention belongs from the description below.

According to one aspect of the present invention, a battery power cut-off device is provided, including: a lower case having a mounting space formed along a first axis direction in a longitudinal direction with an open upper portion; a plurality of relays individually mounted in the mounting space, respectively; an upper case coupled to the lower case so as to cover the open upper portion of the mounting space, and including a plurality of upper mounting spaces formed in positions corresponding one-to-one with the plurality of relays, respectively; and a permanent magnet disposed in each of the plurality of upper mounting spaces so as to control an arc generated from the relay.

In addition, the permanent magnet can be detachably coupled to the upper case via a permanent magnet holder that is detachably coupled to the upper case while being arranged along the inner circumference of the upper mounting space.

In addition, the permanent magnet may include a first permanent magnet and a second permanent magnet, and the permanent magnet holder may include a first holder to which the first permanent magnet is detachably coupled and a second holder to which the second permanent magnet is detachably coupled, and the first holder and the second holder may be respectively coupled to the upper case so that the first permanent magnet and the second permanent magnet face each other in the upper mounting space.

In addition, the upper case may include a joining groove formed to be positioned in the upper mounting space, and the permanent magnet holder may include a holder body to which the permanent magnet is detachably joined and a hook portion that protrudes outwardly from an end of the holder body by a predetermined length and is detachably fitted into the joining groove.

In addition, the permanent magnet holder may include a plurality of support ribs that protrude from the holder body so as to support a rim of the permanent magnet, and the permanent magnet may be removably coupled to one surface of the holder body with a rim supported by the plurality of support ribs.

In addition, the relay may include a fixed contact that is provided to protrude upward from the body by a certain height and be exposed to the outside, and the upper mounting space may accommodate the fixed contact of the relay while the relay is accommodated in the mounting space, and the permanent magnet may be arranged within the upper mounting space so as to surround the body of the relay.

At this time, the permanent magnet may be arranged to surround the arc chamber portion of the body of the relay.

In addition, the permanent magnet may include a first permanent magnet and a second permanent magnet arranged in the upper mounting space so that one side faces each other, and each of the first permanent magnet and the second permanent magnet may be provided in multiple pieces to form a Halbach arrangement.

In addition, the lower case may include a plurality of mounting spaces formed to be partitioned from each other while being arranged along the first axis direction, the plurality of relays may be individually mounted in each of the plurality of mounting spaces, and the plurality of upper mounting spaces may be formed at positions corresponding one-to-one with each of the plurality of mounting spaces.

In addition, the battery power cut-off device may further include a circuit board including an external connection terminal for electrical connection with the outside, and the lower case may further include a storage space formed so as to be adjacent to the mounting space along a second axis direction in the width direction while having an upper portion open and being partitioned from the mounting space by a bulkhead.

In this case, each of the plurality of relays can be electrically connected to the external connection terminal through direct connection with the circuit board mounted in the storage space while being individually mounted in the mounting space.

In addition, each of the plurality of relays may include a coil terminal protruding outwardly from the body by a predetermined length, and the circuit board may include a terminal connection portion provided so that one end of the coil terminal can be fitted, and the terminal connection portion may be electrically connected to the external connection terminal through a wiring pattern formed on the circuit board.

At this time, the relay can be physically connected to the circuit board while being electrically connected to the external connection terminal through the physical connection of the coil terminal and the terminal connection portion.

According to the above configuration, the battery power cut-off device according to the present invention can simplify the electrical connection work even if it includes a plurality of relays, thereby simplifying the assembly process and increasing work productivity.

That is, the battery power cut-off device according to the present invention can secure electrical current stability while easily configuring electrical connections between a plurality of relays and other components, thereby increasing the reliability of the product.

In addition, since the battery power cut-off device according to the present invention is arranged vertically with the bottom surface of the storage space while the circuit board is located on the side of the relay, the worker can easily check the arrangement and connection status of the relay.

In addition, the battery power cut-off device according to the present invention can reduce airflow obstruction inside the lower case because the circuit board is arranged vertically to the bottom surface of the storage space. That is, if the circuit board is arranged horizontally parallel to the bottom surface, the circuit board may obstruct the flow of internal air and be heated by the increase in temperature of the internal air, but the present invention can fundamentally prevent or minimize such a problem by arranging the circuit board vertically to the bottom surface of the storage space.

It should be understood that the effects of the present invention are not limited to the effects described above, but include all effects that can be inferred from the composition of the invention described in the detailed description or claims of the present invention.

FIG. 1 is a drawing showing a battery power cut-off device according to one embodiment of the present invention.
Figure 2 is a drawing separating the main components from Figure 1.
Figure 3 is a drawing of Figure 2 viewed from a different direction.
Figure 4 is a plan view of Figure 1.
Figure 5 is a drawing showing a part of the upper case cut along the AA direction in Figure 1.
FIG. 6 is a drawing of the lower case as viewed from above in a battery power cut-off device according to one embodiment of the present invention.
FIG. 7 is a drawing for explaining the connection relationship between a relay, a lower case, and a circuit board in a battery power cut-off device according to one embodiment of the present invention. It is a drawing schematically showing a state in which a circuit board is separated from the lower case while the relay is mounted in the lower case.
Figure 8 is a schematic drawing showing the state in which the circuit board is connected to the lower case in Figure 7.
Figure 9 is a drawing showing the upper case and the lower case cut along the BB direction in Figure 4.
Figure 10 is an enlarged view of portion “C” in Figure 9.
Fig. 11 is a drawing showing a modified example of the coil terminal support part in Fig. 10.
FIG. 12 is a drawing showing an upper case in a battery power cut-off device according to one embodiment of the present invention.
Figure 13 is a drawing of Figure 12 viewed from below.
FIG. 14 is a drawing schematically showing a built-in bus bar embedded in an upper case in a battery power cut-off device according to one embodiment of the present invention.
FIG. 15 is a drawing schematically showing the electrical connection relationship of a built-in bus bar, a circuit board, and a relay in a battery power cut-off device according to one embodiment of the present invention.
FIG. 16 is a drawing showing a state in which some of the permanent magnet holders and permanent magnets are separated from the upper case in a battery power cut-off device according to one embodiment of the present invention.
FIG. 17 is a drawing showing a permanent magnet holder and a permanent magnet in a separated state that can be applied to a battery power cut-off device according to one embodiment of the present invention.

Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily practice the present invention. The present invention may be implemented in various different forms and is not limited to the embodiments described herein. In order to clearly describe the present invention, parts that are not related to the description are omitted in the drawings, and the same reference numerals are assigned to the same or similar components throughout the specification.

The words and terms used in this specification and claims should not be construed as limited to their usual or dictionary meanings, but should be interpreted as having meanings and concepts consistent with the technical idea of the present invention, in accordance with the principles by which the inventor can define terms and concepts in order to best describe his or her invention.

Additionally, the upper surface used in this specification and claims may mean a surface viewed from above with reference to Fig. 1, and the lower surface may mean a surface viewed from below with reference to Fig. 1.

In addition, the first axis direction used in the present specification and claims may mean a direction parallel to the x-axis illustrated in FIGS. 1 to 3, the second axis direction may mean a direction parallel to the y-axis illustrated in FIGS. 1 to 3, and the third axis direction may mean a direction parallel to the z-axis illustrated in FIGS. 1 to 3.

In addition, the longitudinal direction used in the present specification and claims may mean a direction parallel to the x-axis, the width direction may mean a direction parallel to the y-axis, and the height direction may mean a direction parallel to the z-axis.

A battery power cut-off device (100) according to one embodiment of the present invention can connect or cut off power between a battery and a load. For example, a battery power cut-off device (100) according to one embodiment of the present invention can be applied to any vehicle equipped with a battery (not shown), such as an EV, an HEV, a PHEV (Plug-in Hybrid Electric Vehicle), or an HV.

In addition, the battery power cut-off device (100) according to one embodiment of the present invention can be applied to any power device equipped with a battery, such as an ESS (Energy Storage System).

A battery power cut-off device (100) according to one embodiment of the present invention may include a lower case (110), a relay (120), a circuit board (130), and an upper case (140) as shown in FIGS. 1 to 3.

In the present invention, the relay (120) is a device that transmits a mechanical drive or current signal by utilizing the principle of an electromagnet, and may include a driving unit (not shown) including a coil (not shown) for applying a driving force therein, a movable contact (not shown) operated by the driving unit, a fixed contact (123) for allowing or blocking current flow through contact with and separation from the movable contact, and a coil terminal (122) for electrical connection with the circuit board (130), and parts of the driving unit, the movable contact, and the fixed contact (123) may be accommodated inside the body (121).

In addition, the body (121) may include a portion in which a coil terminal (122) electrically connected to the coil protrudes outward by a certain length while accommodating the driving unit and the coil, and an arc chamber portion (121a) that accommodates the fixed contact (123) and the movable contact inside.

That is, the body (121) may include a portion forming a lower portion while accommodating a driving unit and a coil therein, and an arc chamber portion (121a) forming an upper portion while accommodating a portion of the fixed contactor (123) and a movable contactor therein, and the coil terminal (122) may be provided to protrude a certain length outward from a portion forming the lower portion of the body (121).

A relay (120) like this can perform any one of various functions that are commonly used, such as a main relay, a high-speed charging relay, a low-speed charging relay, etc.

Here, the fixed contact (123) may be provided so as to protrude upward from the body (121) by a certain height and be exposed to the outside, and the coil terminal (122) may be provided so as to protrude laterally from the body (121) by a certain length while being connected to the coil.

In addition, the relay (120) can be mounted in the mounting space (111) of the lower case (110) described below so that the fixed contact (123) is positioned at the upper portion of the body (121).

Accordingly, when the relay (120) is mounted in the mounting space (111), the fixed contact (123) can be electrically connected to other electrical components or electrical elements through a cable such as a bus bar or wire harness, and the coil terminal (122) can also be electrically connected to an electrical component or electrical element.

In addition, the relay (120) may be provided in multiple units, and each of the multiple relays (120a, 120b, 120c) may perform the same function or different functions.

The lower case (110) can provide a space for individually accommodating the relay (120) and the circuit board (130), and each of the relay (120) and the circuit board (130) can be inserted into the lower case (110) along the third axis direction (z-axis direction), which is the height direction of the lower case (110).

In addition, when the lower case (110) is provided with a plurality of relays (120), the plurality of relays (120a, 120b, 120c) and the circuit board (130) can be individually accommodated.

To this end, the lower case (110) may include a mounting space (111) formed along a first axis direction (x-axis direction) that is open at the top and longitudinal as shown in FIGS. 2 and 6, and a storage space (112) formed along a second axis direction (y-axis direction) that is open at the top and partitioned from the mounting space (111) by a partition wall (118) and adjacent to the mounting space (111) along the width direction.

In this case, the mounting space (111) may be a space where the relay (120) is mounted, and the storage space (112) may be a space where the circuit board (130) is mounted.

That is, in the battery power cut-off device (100) according to one embodiment of the present invention, the mounting space (111) in which the relay (120) is mounted and the storage space (112) in which the circuit board (130) is mounted can be formed in the lower case (110) so as to be arranged along the width direction while being partitioned from each other.

At this time, the mounting space (111) may include a plurality of mounting spaces (111a, 111b, 111c) that are formed to be partitioned from each other.

In addition, when the mounting space (111) includes a plurality of mounting spaces (111a, 111b, 111c), the plurality of mounting spaces (111a, 111b, 111c) may be formed in the lower case (110) so as to be arranged along the longitudinal direction while being partitioned from each other.

Accordingly, even if the battery power cut-off device (100) according to one embodiment of the present invention includes a plurality of relays (120a, 120b, 120c), the plurality of relays (120a, 120b, 120c) can be individually mounted in separate spaces while being all housed in a lower case (110) provided as a single member, thereby reducing the total number of parts and increasing work productivity.

In addition, when the battery power cut-off device (100) according to one embodiment of the present invention includes a plurality of relays (120a, 120b, 120c), if the plurality of relays (120a, 120b, 120c) are individually inserted into the mounting spaces (111) that are partitioned from each other, each relay (120) can be fixed to the lower case (110) without using a separate fixing member. Through this, the battery power cut-off device (100) according to one embodiment of the present invention can reduce the number of parts, such as fixing members for fixing the plurality of relays (120a, 120b, 120c) to the lower case (110), thereby improving the assembling efficiency.

In addition, in the battery power cut-off device (100) according to one embodiment of the present invention, the relay (120) and the circuit board (130) mounted on the lower case (110) can be individually accommodated in the mounting space (111) and the storage space (112) that are partitioned from each other along the width direction, so that the relay (120) and the circuit board (130) can be mounted so as to be located in different partitioned spaces without being stacked on each other in the lower case (110).

Similarly, when the battery power cut-off device (100) according to one embodiment of the present invention includes a plurality of relays (120a, 120b, 120c), the plurality of relays (120a, 120b, 120c) mounted on the lower case (110) can be individually accommodated in a plurality of mounting spaces (111a, 111b, 111c) that are partitioned from each other along the longitudinal direction, so that each of the plurality of relays (120a, 120b, 120c) can be individually mounted on the lower case (110) or individually separated from the lower case (110).

Accordingly, the battery power cut-off device (100) according to one embodiment of the present invention can increase the convenience of operation by individually coupling or separating the relay (120) and the circuit board (130) to or from the lower case (110).

Here, the mounting space (111) may include at least one protruding rib (116) that protrudes upward from the floor surface to a certain height as shown in FIG. 6.

Accordingly, the relay (120) mounted in the mounting space (111) can be in direct contact with the bottom surface of the mounting space (111) through the protruding rib (116).

That is, the protruding rib (116) can reduce the contact area between the relay (120) and the bottom surface of the mounting space (111). Accordingly, even if an error occurs in the mounting space (111) for mounting the relay (120), the mounting space (111) can be easily corrected.

Meanwhile, the circuit board (130) can be mounted in the storage space (112) so as to be arranged perpendicular to the bottom surface of the storage space (112).

That is, the circuit board (130) can be mounted vertically in the storage space (112) as shown in FIGS. 7 and 8.

Accordingly, in the battery power cut-off device (100) according to one embodiment of the present invention, as described above, the relay (120) and the circuit board (130) are not stacked on each other but are arranged adjacently along the width direction of the lower case (110), and since the circuit board (130) is arranged vertically in the storage space (112), the overall width of the lower case (110) can be minimized.

At this time, in the battery power cut-off device (100) according to one embodiment of the present invention, when the relay (120) is mounted in the mounting space (111) and the circuit board (130) is mounted in the storage space (112), the relay (120) can be electrically connected to the external connection terminal (131).

That is, the relay (120) can be electrically connected to the external connection terminal (131) through direct connection between the coil terminal (122) and the circuit board (130) mounted in the storage space (112) while mounted in the mounting space (111).

In addition, when the battery power cut-off device (100) according to one embodiment of the present invention includes a plurality of relays (120a, 120b, 120c), each of the plurality of relays (120a, 120b, 120c) may be individually mounted in the plurality of mounting spaces (111a, 111b, 111c) and may be electrically connected to the external connection terminal (131) through direct coupling between the coil terminal (122) and the circuit board (130) mounted in the storage space (112).

To this end, the circuit board (130) may include an external connection terminal (131) for electrical connection with the outside, and a first terminal connection portion (132) provided so that one end of the coil terminal (122) can be fitted.

In this case, the first terminal connection part (132) can be electrically connected to the external connection terminal (131) through the wiring pattern (133) formed on the circuit board (130).

In addition, when the first terminal connection portion (132) is provided in multiple units, each of the multiple first terminal connection portions (132) can be electrically connected to the external connection terminal (131) through the wiring pattern (133).

Accordingly, the relay (120) can be physically connected to the circuit board (130) while being electrically connected to the external connection terminal (131) through the physical connection of the coil terminal (122) and the first terminal connection portion (132) while being mounted in the mounting space (111).

In addition, when the battery power cut-off device (100) according to one embodiment of the present invention includes a plurality of relays (120a, 120b, 120c), each of the plurality of relays (120a, 120b, 120c) may be individually mounted in the plurality of mounting spaces (111a, 111b, 111c) and may be physically connected to the circuit board (130) while being electrically connected to the external connection terminal (131) through the physical connection of the coil terminal (122) and the first terminal connection portion (132) corresponding to each other.

Here, the coil terminal (122) may include a first portion (122a) extending from the body (121) along the second axis direction, which is the width direction of the lower case (110), when the relay (120) is mounted in the mounting space (111) as shown in FIGS. 7 and 8, and a second portion (122b) extending upward from an end of the first portion (122a) along the third axis direction, which is the height direction of the lower case (110), and the first terminal connecting portion (132) may be coupled with the second portion (122b) of the coil terminal (122).

Through this, when the circuit board (130) is inserted through the open upper portion of the storage space (112) while the relay (120) is mounted in the mounting space (111), the coil terminal (122) and the first terminal connection portion (132) can be physically connected, and the relay (120) can be electrically connected to the external connection terminal (131) through the first terminal connection portion (132) and the wiring pattern (133).

For example, the external connection terminal (131) may be an external connection connector, and the external connection connector may be supplied with power for driving or receive a control signal for controlling the relay (120).

Accordingly, the relay (120) mounted in the mounting space (111) can receive power for driving or a control signal for controlling the relay (120) through the external connection terminal (131).

Through this, even if the battery power cut-off device (100) according to one embodiment of the present invention includes a plurality of relays (120a, 120b, 120c), each relay (120a, 120b, 120c) can be electrically connected to the external connection terminal (131) provided as one through the combination of the coil terminal (122) and the first terminal connection portion (132) to which each relay is physically directly connected, so that the connection terminal for electrical connection with the outside can be integrated into one and used.

Accordingly, even if the battery power cut-off device (100) according to one embodiment of the present invention includes a plurality of relays (120a, 120b, 120c), the number of connection terminals used for electrically connecting each relay (120a, 120b, 120c) to the outside can be minimized, and the cable connection work for electrical connection between the connection terminals can be omitted.

Here, the external connection terminal (131) is described as a connector for external connection, but the present invention is not limited thereto, and any of various known electrical components can be applied to the external connection terminal (131) as long as electrical connection with the outside is possible.

In addition, the circuit board (130) may be configured in a form that includes the external connection terminal (131), the first terminal connection portion (132), and a wiring pattern (133) that connects the external connection terminal (131) and the first terminal connection portion (132), but may also be a precharge circuit-integrated PCB that includes, in addition to the external connection terminal (131), the first terminal connection portion (132), and the wiring pattern (133), a precharge circuit configured through a semiconductor switch (134) and a precharge resistor (135), and a second terminal connection portion (136) that is provided to be electrically connected to the precharge circuit.

Meanwhile, a battery power cut-off device (100) according to one embodiment of the present invention may be configured so that the relay (120) can smoothly move downward through the open upper portion of the mounting space (111) even if the relay (120) includes a coil terminal (122) that protrudes from the body (121) toward the storage space (112) while being mounted in the mounting space (111).

That is, when the circuit board (130) is inserted through the open upper portion of the storage space (112) while the relay (120) is mounted in the mounting space (111) as described above, the coil terminal (122) protruding from the body (121) of the relay (120) toward the storage space (112) can be smoothly connected to the first terminal connection portion (132) of the circuit board (130) whose second portion (122b) is inserted into the storage space (112).

To this end, the lower case (110) may include a communication space (113) that connects the mounting space (111) and the storage space (112) which are arranged adjacent to each other along the width direction as shown in FIG. 6, and the communication space (113) may be formed so that the upper part is open.

That is, the above-mentioned communication space (113) may be formed to be located in a partition wall (118) for dividing the mounting space (111) and the storage space (112) along the width direction of the lower case (110), and may be formed by cutting a certain depth from the top to the bottom of the partition wall (118) so that the top is open.

Accordingly, when the relay (120) is inserted into the mounting space (111) through the open upper portion of the mounting space (111), the coil terminal (122) protruding from the body (121) by a certain length can be arranged to cross the communication space (113).

That is, when the relay (120) is inserted into the mounting space (111), the first part (122a) of the coil terminal (122) can be positioned so as to be located within the communication space (113), and the second part (122b) can be positioned so as to be located in the storage space (112).

Accordingly, when the circuit board (130) is inserted into the storage space (112) while the relay (120) is inserted into the mounting space (111), the second part (122b) placed in the storage space (112) can be smoothly inserted into the first terminal connection part (132) provided on the circuit board (130) while protruding upward from the bottom surface of the storage space (112).

Here, the relay (120) may include a plurality of corner protrusions (124) that protrude downward at a certain height on the lower edge side of the body (121) as shown in FIG. 3.

Such multiple corner protrusions (124) can prevent the bottom surface of the relay (120) from making surface contact with the bottom surface of the mounting space (111) when the relay (120) is inserted into the mounting space (111).

That is, the bottom surface of the body (121) of the relay (120) mounted in the mounting space (111) can be separated from the bottom surface of the mounting space (111) through the corner protrusion (124).

Through this, even if the coil terminal (122) is provided to protrude outward from the lower side of the body (121), deformation of the coil terminal (122) due to external force can be prevented by blocking the possibility of the coil terminal (122) coming into contact with the bottom surface of the mounting space (111).

In the present invention, when the lower case (110) includes a plurality of mounting spaces (111a, 111b, 111c), the communication space (113) may be provided in a number corresponding one-to-one to the plurality of mounting spaces (111a, 111b, 111c) so that each of the plurality of mounting spaces (111a, 111b, 111c) can be connected with the storage space (112).

That is, as illustrated in FIG. 6, the plurality of mounting spaces (111a, 111b, 111c) can be connected to the storage space (112) through the plurality of communicating spaces (113a, 113b, 113c) corresponding to each other in a one-to-one manner.

Meanwhile, a battery power cut-off device (100) according to one embodiment of the present invention may include a reinforcing rib (114) to prevent a decrease in strength of the lower case (110) due to the communication space (113) even if the lower case (110) includes the communication space (113).

That is, the lower case (110) may include at least one reinforcing rib (114) that protrudes upward from the bottom surface of the communication space (113) to a certain height as shown in FIG. 6.

In addition, the reinforcing rib (114) may be formed at a position that does not obstruct the entry of the coil terminal (122) when the coil terminal (122) is placed in the communication space (113).

Through this, in the battery power cut-off device (100) according to one embodiment of the present invention, even if the lower case (110) includes the communication space (113), the strength of the lower case (110) can be reinforced through the reinforcing rib (114), thereby increasing durability against external force.

Meanwhile, when a relay (120) is mounted in the mounting space (111) and a circuit board (130) is mounted in the storage space (112), in the battery power cut-off device (100) according to one embodiment of the present invention, the relay (120) can be electrically connected to an external connection terminal (131) provided on the circuit board (130) through physical contact between the coil terminal (122) and the circuit board (130).

At this time, the battery power cut-off device (100) according to one embodiment of the present invention may further include a coil terminal support member (117, 217) provided in the lower case (110) so that the relay (120) and the external connection terminal (131) can stably conduct current through physical contact between the coil terminal (122) and the circuit board (130).

That is, when the relay (120) and the circuit board (130) are mounted in the mounting space (111) and the storage space (112), respectively, the coil terminal support member (117, 217) may be provided in the lower case (110) to press upward the contact portion (137) of the coil terminal (122) or the circuit board (130) in contact with the coil terminal (122).

For example, as shown in FIGS. 9 and 10, the coil terminal support member (117) may be a protrusion formed to protrude upward from the bottom surface of the storage space (112) to a certain height so as to be able to support the lower surface of the coil terminal (122) by contacting it when the relay (120) is mounted in the mounting space (111).

In this case, as described above, the coil terminal (122) may include a first portion (122a) extending from the body (121) along the second axis direction, which is the width direction of the lower case (110), while the relay (120) is mounted in the mounting space (111), and a second portion (122b) extending upward from an end of the first portion (122a) along the third axis direction, which is the height direction of the lower case (110), and the second portion (122b) may be arranged to be located within the storage space (112).

In addition, the circuit board (130) may include an external connection terminal (131) for electrical connection with the outside, and a first terminal connection portion (132) provided so that one end of the coil terminal (122) can be fitted, and the first terminal connection portion (132) may be electrically connected to the external connection terminal (131) through a wiring pattern (133) formed on the circuit board (130).

Through this, when the circuit board (130) is inserted through the open upper part of the storage space (112) while the relay (120) is mounted in the mounting space (111), as shown in FIG. 10, the second part (122b) of the coil terminal (122) can be physically connected to the first terminal connection part (132), and the coil terminal support part (117) that protrudes upward from the bottom surface of the storage space (112) by a certain height can support the lower surface of the first part (122a) that is arranged in the storage space (112).

That is, when the circuit board (130) is inserted into the storage space (112), a fastening frictional force may occur when the second part (122b) of the coil terminal (122) and the first terminal connection part (132) are physically connected, and the coil terminal may be pressed downward by the fastening frictional force.

In this case, the coil terminal support portion (117) formed on the bottom surface of the storage space (112) contacts and supports the lower portion of the coil terminal (122) that is fitted into the first terminal connection portion (132), thereby preventing the coil terminal (122) from moving downward, so that the second portion (122b) can be smoothly connected to the first terminal connection portion (132).

Through this, when the circuit board (130) is inserted through the open upper portion of the storage space (112) while the relay (120) is mounted in the mounting space (111), the coil terminal (122) can be smoothly connected to the first terminal connection portion (132), and the relay (120) can be electrically connected to the external connection terminal (131) through the wiring pattern (133) and the first terminal connection portion (132).

In addition, since the coil terminal support member (117) supports the lower side of the coil terminal (122) during the process of inserting the circuit board (130), even if an excessive load is applied to the coil terminal (122) during the process of connecting the first terminal connection member (132) and the coil terminal (122), the coil terminal (122) can be prevented from being damaged.

As another example, as illustrated in FIG. 11, the coil terminal support member (217) may be a protrusion formed by protruding a certain height from the bottom surface of the communication space (113).

In this case, the coil terminal (122) may be formed to extend from the body (121) along the second axis direction, which is the width direction of the lower case (110), while the relay (120) is mounted in the mounting space (111), and the coil terminal (122) may be positioned to be located within the communication space (113).

In addition, the circuit board (130) may include an external connection terminal (131) for electrical connection with the outside, and a contact portion (137) that protrudes a certain length so as to be in physical contact with the coil terminal (122) when mounted in the storage space (112).

In this case, the contact portion (137) may be connected to the first terminal connection portion (132), and the first terminal connection portion (132) may be electrically connected to the external connection terminal (131) through a wiring pattern (133) formed on the circuit board (130).

That is, the contact portion (137) can protrude a certain length so that one end is connected to the first terminal connection portion (132) of the circuit board (130) and the other end is positioned within the communication space (113).

Here, the contact portion (137) may be detachably connected to the first terminal connection portion (132), but may also be formed integrally with the first terminal connection portion (132), and the contact portion (137) may be directly electrically connected to the external connection terminal (131) through the wiring pattern (133).

In this case, when the relay (120) is mounted in the mounting space (111) and the circuit board (130) is mounted in the storage space (112), the contact portion (137) and the coil terminal (122) can be arranged so that a portion of the length including one end overlaps each other in the communication space (113) as shown in FIG. 11, and the coil terminal support portion (217) that protrudes upward from the bottom surface of the communication space (113) by a certain height can support the lower portion of a portion of the contact portion (137) and a portion of the coil terminal (122) that overlap each other in the communication space (113).

Accordingly, when the circuit board (130) is inserted into the storage space (112) and one end of the contact portion (137) is supported by the coil terminal support portion (217), and the relay (120) is inserted into the mounting space (111) so that one end of the coil terminal (122) partially overlaps the end side of the contact portion (137), a part of the contact portion (137) and a part of the coil terminal (122) that overlap each other in the communication space (113) can both be supported upwards by the coil terminal support portion (217).

Similarly, when the relay (120) is inserted into the mounting space (111) and one end of the coil terminal (122) is supported by the coil terminal support member (217), and the circuit board (130) is inserted into the storage space (112) so that one end of the contact member (137) partially overlaps with the end side of the coil terminal (122), a part of the contact member (137) and a part of the coil terminal (122) that overlap each other in the communication space (113) can both be supported upward by the coil terminal support member (217).

Due to this, a part of the contact portion (137) and a part of the coil terminal (122) that overlap each other in the communication space (113) can be maintained in contact with each other through the coil terminal support portion (217), so that the relay (120) can be stably powered on with the external connection terminal (131) through the contact of the coil terminal (122) and the contact portion (137).

The upper case (140) can be coupled to the lower case (110) so as to cover the open upper portion of the lower case (110).

For example, the upper case (140) can be coupled to the lower case (110) so as to cover both the open upper portion of the mounting space (111) and the open upper portion of the storage space (112).

In addition, when the lower case (110) includes a plurality of mounting spaces (111a, 111b, 111c), the upper case (140) can be coupled to the lower case (110) so as to cover both the open upper portion of each of the plurality of mounting spaces (111a, 111b, 111c) and the open upper portion of the storage space (112).

In this case, the upper case (140) can be connected to the lower case (110) so that the external connection terminal (131) provided on the circuit board (130) is exposed to the outside while covering the upper portion of the storage space (112) as shown in FIG. 1.

Accordingly, even if the upper case (140) is connected to the lower case (110) while the circuit board (130) is mounted in the storage space (112), the external connection terminal (131) is exposed to the outside so that it can be smoothly connected to a battery or other load.

At this time, the upper case (140) can be detachably combined with the lower case (110).

To this end, the lower case (110) may include a plurality of protrusions (115) that protrude outwardly along the circumferential direction, and the upper case (140) may include fitting members (141) provided at positions corresponding to each of the plurality of protrusions (115) so that the protrusions (115) can be removably fitted.

Through this, the upper case (140) and the lower case (110) can be detachably connected to each other through corresponding protrusions (115) and fitting members (141).

However, the method of joining the upper case (140) and the lower case (110) is not limited to this, and any of various known methods can be applied as long as they can be joined detachably.

At this time, in the battery power cut-off device (100) according to one embodiment of the present invention, the relay (120) may be mounted in the mounting space (111) of the lower case (110) so that the fixed contact (123) is positioned at the upper portion of the body (121), and the fixed contact (123) may be electrically connected to the circuit board (130) mounted in the storage space (112) through the upper case (140).

That is, when the upper case (140) and the lower case (110) are coupled with each other while the relay (120) is mounted in the mounting space (111) and the circuit board (130) is mounted in the storage space (112), the fixed contact (123) of the relay (120) and the circuit board (130) can be electrically connected to each other through the upper case (140).

To this end, a battery power cut-off device (100) according to one embodiment of the present invention may include a built-in bus bar (150) embedded in the upper case as illustrated in FIGS. 12 to 14.

When the upper case (140) and the lower case (110) are connected to each other while the relay (120) is mounted in the mounting space (111) and the circuit board (130) is mounted in the storage space (112), the fixed contact (123) of the relay (120) and the circuit board (130) can be electrically connected to each other as shown in FIG. 15.

Here, the circuit board (130) may be a precharge circuit-integrated PCB including a precharge circuit configured through the above-described external connection terminal (131), wiring pattern (133), and first terminal connection portion (132), a semiconductor switch (134), and a precharge resistor (135), and a second terminal connection portion (136) provided on the circuit board (130) so as to be electrically connected to the precharge circuit.

In this case, the embedded bus bar (150) can electrically connect the fixed contact (123) of the relay (120) and the second terminal connection part (136) with the upper case (140) and the lower case (110) being connected to each other.

For example, the above-described built-in bus bar (150) may include a body portion (151) formed of a bar-shaped member having a predetermined length as illustrated in FIG. 14, a first fastening hole (152) formed on one end of the body portion (151), and a second fastening hole (153) formed on the other end of the body portion (151).

In addition, the embedded bus bar (150) can be embedded in the upper case (140) so that the first fastening hole (152) and the second fastening hole (153) are exposed to the outside, as shown in FIG. 4 and FIG. 12.

In addition, the embedded bus bar (150) may be arranged so that one end including the first fastening hole (152) is exposed to the outside at a position corresponding to the mounting space (111) while the upper case (140) and the lower case (110) are connected to each other, and the other end including the second fastening hole (153) may be arranged so that the other end is exposed to the outside at a position corresponding to the storage space (112).

Accordingly, when the upper case (140) and the lower case (110) are coupled with each other while the relay (120) is mounted in the mounting space (111) and the circuit board (130) is mounted in the storage space (112), one end of the embedded bus bar (150) including the first fastening hole (152) can come into contact with the fixed contact (123) of the relay (120), and the other end including the second fastening hole (153) can come into contact with the second terminal connection portion (136) of the circuit board (130).

In this case, as illustrated in Fig. 15, the end portion of the embedded bus bar (150) including the second fastening hole (153) can be connected to the second terminal connection portion (136) through a fixing member (180). Through this, the embedded bus bar (150) can be stably connected to the second terminal connection portion (136) of the circuit board (130).

Similarly, the embedded bus bar (150) may have an end portion including the first fastening hole (152) coupled to the fixed contact (123) through a fixed member (not shown). Through this, the embedded bus bar (150) may be stably electrically connected to the fixed contact (123) of the relay (120).

At this time, the embedded bus bar (150) may include a first extension portion (154) that extends upward from one end of the body portion (151) by a certain length, as shown in the enlarged view of FIG. 15, and a second extension portion (155) that extends horizontally from an end of the first extension portion (154) by a certain length.

In this case, the first fastening hole (152) can be formed to be located in the second extension portion (155).

Accordingly, even if the upper surface of the fixed contact (123) and the upper surface of the second terminal connection portion (136) of the circuit board (130) have different heights when the relay (120) is mounted in the mounting space (111), one surface of the second extension portion (155) in which the first fastening hole (152) is formed can be in surface contact with the upper surface of the fixed contact (123) of the relay (120).

That is, one side of the second extension portion (155) can be in close contact with the upper surface of the fixed contact (123), and the end including the second fastening hole (153) can be in close contact with the second terminal connection portion (136).

Through this, even if the upper surface of the fixed contact (123) is positioned at a relatively higher position than the upper surface of the second terminal connection portion (136), the embedded bus bar (150) can be stably current-conducted with the fixed contact (123) and the second terminal connection portion (136) of the relay (120), respectively.

In the present invention, when the relay (120) is provided in multiple units, the embedded bus bar (150) may also be provided to correspond to the total number of relays (120).

For example, when three mounting spaces (111) are formed in the lower case (110) so as to be separated from each other along the longitudinal direction of the lower case (110), and three relays (120) are individually mounted in each of the three mounting spaces (111), six embedded bus bars (150a, 150b, 150c, 150d, 150e, 150f) can be embedded in the upper case (140).

In such a case, six embedded bus bars (150a, 150b, 150c, 150d, 150e, 150f) may be connected to the fixed contact (123) while being connected entirely to the second terminal connection portion (136), but some embedded bus bars (150b, 150f) may be provided so that one end is connected to the fixed contact (123) while not being connected to the second terminal connection portion (136).

Accordingly, in the battery power cut-off device (100) according to one embodiment of the present invention, when the upper case (140) and the lower case (110) are coupled to each other while the relay (120) and the circuit board (130) are respectively mounted in the mounting space (111) and the storage space (112), the relay (120) can be electrically connected to the second terminal connection (136) of the circuit board (130) through the fixed contact (123) and the embedded bus bar (150) while being energized with the external connection terminal (131) through the coupling of the coil terminal (122) and the first terminal connection (132) described above.

Accordingly, in the battery power cut-off device (100) according to one embodiment of the present invention, even if the relay (120) and the circuit board (130) are mounted in the mounting space (111) and the storage space (112), respectively, when the upper case (140) and the lower case (110) are coupled to each other, the fixed contact (123) of the relay (120) and the circuit board (130) can be electrically connected through the embedded bus bar (150) embedded in the upper case (140), thereby reducing or minimizing the wiring work for electrically connecting the fixed contact (123) of the relay (120) and the circuit board (130).

In addition, when the circuit board (130) is provided as a precharge circuit-integrated PCB including a precharge circuit as described above, the relay (120) mounted in the mounting space (111) can be easily connected to the precharge circuit included in the circuit board (130) through the embedded bus bar (150) embedded in the upper case (140).

In the above description, the second terminal connection portion (136) is described as being electrically connected to the precharge circuit included in the circuit board (130), but the present invention is not limited thereto, and the second terminal connection portion (136) may be electrically connected to other electrical components or other circuits mounted on the circuit board (130).

Meanwhile, a battery power cut-off device (100) according to one embodiment of the present invention may include a permanent magnet (161, 162) for controlling an arc that may occur when a relay (120) mounted in the mounting space (111) is operated.

Such permanent magnets (161, 162) can be provided so that even if a plurality of relays (120a, 120b, 120c) are individually mounted in the mounting space (111), they can individually control the arcs that may occur in each of the plurality of relays (120a, 120b, 120c).

To this end, the upper case (140) may include a plurality of upper mounting spaces (142) formed at positions corresponding one-to-one with the plurality of relays (120a, 120b, 120c) as illustrated in FIGS. 13 and 16, and the permanent magnets (161, 162) may be placed in each of the plurality of upper mounting spaces (142) so as to control an arc generated from the relay (120).

In this case, each of the plurality of relays (120a, 120b, 120c) individually mounted in the mounting space (111) may be mounted in the mounting space (111) of the lower case (110) so that the fixed contactor (123) is positioned at the upper portion of the body (121), and the fixed contactor (123) may be positioned so as to be positioned within the upper mounting space (142).

In addition, the permanent magnets (161, 162) may be arranged within the upper mounting space (142) so as to surround the body (121) of the relay arranged in the upper mounting space (142) while being arranged along the inner circumference of the upper mounting space (142).

For example, the permanent magnets (161, 162) may be placed in the upper mounting space (142) to surround the arc chamber portion (121a) forming the upper portion of the body (121) so as to accommodate the fixed contact (123) and the movable contact (not shown) inside the body (121).

As a non-limiting example, as illustrated in FIG. 16, the permanent magnets (161, 162) may include a first permanent magnet (161) and a second permanent magnet (162), and the first permanent magnet (161) and the second permanent magnet (162) may be coupled to the upper case (140) so as to face each other in the upper mounting space (142).

At this time, the permanent magnet (161, 162) can be detachably coupled to the upper case (140) through the permanent magnet holder (170).

That is, the battery power cut-off device (100) according to one embodiment of the present invention may further include a permanent magnet holder (170) detachably coupled to the upper case (140), and the permanent magnets (161, 162) may be detachably coupled to the upper case (140) through the permanent magnet holder (170).

For example, the permanent magnet holder (170) may include a first holder (170a) to which the first permanent magnet (161) is coupled and a second holder (170b) to which the second permanent magnet (162) is coupled, and each of the first holder (170a) and the second holder (170b) may include a holder body (171) to which the permanent magnets (161, 162) are detachably coupled and a hook portion (172) that protrudes outwardly from an end of the holder body (171) by a predetermined length.

Additionally, the upper case (140) may include a joining groove (143) formed to be positioned in the upper mounting space (142).

Accordingly, each of the first holder (170a) and the second holder (170b) can be detachably coupled to the upper case (140) in the upper mounting space (142) through the hook portion (172) and the coupling groove (143).

In this case, the first holder (170a) and the second holder (170b) can be respectively coupled to the upper case (140) so that the first permanent magnet (161) and the second permanent magnet (162) face each other in the upper mounting space (142) as shown in FIG. 16.

In addition, the first permanent magnet (161) and the second permanent magnet (162) facing each other in the upper mounting space (142) can be arranged so that their polarities face each other.

Through this, even if an arc occurs during operation of the relay (120), the first permanent magnet (161) and the second permanent magnet (162) can quickly extend the arc by forming an electromagnetic force through a magnetic field together with the current flowing through the fixed contactor (123) and the movable contactor, thereby preventing damage to components caused by the arc.

At this time, the permanent magnet (161, 162) can be detachably coupled to the permanent magnet holder (170).

For example, each of the first holder (170a) and the second holder (170b) may include a plurality of support ribs (173) that protrude from the holder body (171) to support the edges of the permanent magnets (161, 162), as illustrated in FIG. 17.

Accordingly, the permanent magnet (161, 162) can be detachably coupled to one surface of the holder body (171) by having its edge supported by the plurality of support ribs (173).

At this time, each of the first permanent magnet (161) and the second permanent magnet (162) may be provided as one, but may also be configured to form a Halbach arrangement with multiple magnets.

For example, the first permanent magnet (161) may be composed of three permanent magnets (161a, 161b, 161c) arranged adjacent to each other along one direction, and the three permanent magnets (161a, 161b, 161c) may be arranged to form a Halbach arrangement.

Similarly, the second permanent magnet (162) may be composed of three permanent magnets (162a, 162b, 162c) arranged adjacent to each other along one direction, and the three permanent magnets (162a, 162b, 162c) may be arranged to form a Halbach arrangement.

Although the drawing and description illustrate and describe the permanent magnet holder (170) as including a first holder (170a) and a second holder (170b), the present invention is not limited thereto, and the permanent magnet holder (170) may be configured in a form in which the first holder (170a) and the second holder (170b) are connected as one.

That is, the permanent magnet holder (170) may be configured as a single member having a cross-section in a closed loop shape, and the first permanent magnet (161) and the second permanent magnet ((162)) may be removably coupled to the permanent magnet holder configured as a single member.

In addition, as described above, when the lower case (110) includes a plurality of mounting spaces (111a, 111b, 111c), the plurality of relays (120a, 120b, 120c) can be individually mounted in each of the plurality of mounting spaces (111a, 111b, 111c), and the plurality of upper mounting spaces (142) can be formed at positions corresponding one-to-one with each of the plurality of mounting spaces (111a, 111b, 111c).

In this case, the permanent magnets (161, 162) can be respectively placed in the plurality of upper mounting spaces (142) so as to control the arc generated from the relay (120).

Accordingly, the permanent magnets (161, 162) can individually control an arc that may occur in each of the plurality of relays (120a, 120b, 120c) even if the plurality of relays (120a, 120b, 120c) are individually mounted in each of the plurality of mounting spaces (111a, 111b, 111c).

Although the embodiments of the present invention have been described, the spirit of the present invention is not limited to the embodiments presented in this specification, and those skilled in the art who understand the spirit of the present invention will be able to easily propose other embodiments by adding, changing, deleting, or adding components within the scope of the same spirit, but this will also be considered to fall within the spirit of the present invention.

100 : Battery power cutoff device 110 : Lower case
111,111a,111b,111c: Mounting space 112: Storage space
113,113a,113b,113c: Flue space 114: Reinforcing rib
115 : protrusion 116 : protruding rib
117,217: Coil terminal support 120a,120b,120c: Relay
121: Body 122: Coil terminal
122a: Part 1 122b: Part 2
123: Fixed contact 124: Corner projection
130: Circuit board 131: Connector for external connection
132: 1st terminal connection 133: Wiring pattern
134: Semiconductor switch 135: Precharge resistor
136: Second terminal connection part 137: Contact part
140: Upper case 141: Fitting member
142: Upper mounting space 143: Joining groove
150,150a,150b,150c,150d,150e,150f : Embedded busbar
151: Body part 152: First fastening hole
153: 2nd fastening hole 161,161a,161b,161c: 1st permanent magnet
162,162a,162b,162c: 2nd permanent magnet 170: Permanent magnet holder
170a: 1st holder 170b: 2nd holder
171: Holder body 172: Hook part
173: Support rib 180: Fixed member

Claims (11)

A lower case having an open upper portion and a mounting space formed along a first longitudinal axis direction;
A plurality of relays each individually mounted in the above mounting space;
An upper case coupled to the lower case so as to cover the open upper portion of the above mounting space, and including a plurality of upper mounting spaces formed at positions corresponding one-to-one with the plurality of relays; and
A battery power cut-off device including a permanent magnet arranged in each of the plurality of upper mounting spaces so as to control an arc generated from the relay. In the first paragraph,
The above permanent magnet is a battery power cut-off device that is detachably connected to the upper case via a permanent magnet holder that is detachably connected to the upper case while being arranged along the inner circumference of the upper mounting space. In the second paragraph,
The above permanent magnet includes a first permanent magnet and a second permanent magnet,
The above permanent magnet holder includes a first holder to which the first permanent magnet is detachably coupled and a second holder to which the second permanent magnet is detachably coupled.
The above first holder and the second holder are a battery power cut-off device, each of which is coupled to the upper case so that the first permanent magnet and the second permanent magnet face each other in the upper mounting space. In the second paragraph,
The upper case includes a joining groove formed to be positioned in the upper mounting space,
The above permanent magnet holder,
A battery power cut-off device including a holder body to which the permanent magnet is detachably coupled and a hook portion that protrudes outwardly from an end of the holder body by a certain length and is detachably fitted into the coupling groove. In paragraph 4,
The above permanent magnet holder includes a plurality of support ribs that protrude from the holder body so as to support the edge of the permanent magnet.
The above permanent magnet is a battery power cut-off device that is removably connected to one surface of the holder body by supporting the edge through the plurality of support ribs. In the first paragraph,
The above relay includes a fixed contact that is provided to be exposed to the outside while protruding upward from the body at a certain height,
The above upper mounting space accommodates the fixed contact of the relay while the relay is accommodated in the above mounting space,
The above permanent magnet is a battery power cut-off device arranged within the upper mounting space so as to surround the body of the above relay. In Article 6,
The above permanent magnet is a battery power cut-off device arranged to surround the arc chamber portion of the body of the above relay. In the first paragraph,
The above permanent magnet includes a first permanent magnet and a second permanent magnet arranged in the upper mounting space so that one side faces each other,
A battery power cut-off device in which each of the first permanent magnet and the second permanent magnet is provided in a plurality of pieces to form a Halbach arrangement. In the first paragraph,
The above lower case includes a plurality of mounting spaces formed to be separated from each other while being arranged along the first axis direction,
The above plurality of relays are individually mounted in the above plurality of mounting spaces,
The above plurality of upper mounting spaces are battery power cut-off devices formed at positions corresponding one-to-one with the above plurality of mounting spaces. In the first paragraph,
The above battery power cut-off device further includes a circuit board including an external connection terminal for electrical connection with the outside,
The above lower case further includes a storage space formed adjacent to the above mounting space along the second axis direction in the width direction while the upper part is open and partitioned from the above mounting space by a bulkhead,
A battery power cut-off device in which each of the above plurality of relays is electrically connected to the external connection terminal through direct connection with the circuit board mounted in the storage space while being individually mounted in the mounting space. In Article 10,
Each of the above plurality of relays includes a coil terminal protruding outward from the body by a certain length,
The above circuit board includes a terminal connection portion provided so that one end of the coil terminal can be fitted,
The above terminal connection part is electrically connected to the external connection terminal through a wiring pattern formed on the circuit board,
The above relay is a battery power cut-off device that is physically connected to the circuit board while being electrically connected to the external connection terminal through the physical connection of the coil terminal and the terminal connection portion.

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